电子束泵浦钙钛矿纳米晶随机激射的瞬态发光特性

为了满足瞬态光学系统对瞬时显像技术的要求,提出了一种基于钙钛矿纳米晶随机激射的瞬时发光方法.从CsPbBr3纳米晶薄膜的制备与表征出发,分析了该类有源薄膜的制备方法与手段.结合应用需要,设计了以微通道板为核心的电子束泵浦结构,并通过实验验证了CsPbBr3纳米晶薄膜在电子束泵浦下的激射效果,分析了其激射原理与物理现象.最后通过瞬时光泵浦的方法验证了CsPbBr3纳米晶薄膜的瞬时优势.该新型显像薄膜的瞬时探测系统中,不但具有较好的瞬态特性与时间分辨率,而且还可以利用电子束泵浦诱发激射来形成第二级的光放大,进而提升器件的整体探测能力.

Transient Luminescence Characteristics of Random Laser Emission Based on Electron Beam Pumping Perovskite Nanocrystals

In order to meet the requirement of instantaneous imaging technology for transient optical system,a method of instantaneous luminescence based on perovskite nanometer crystal random maser is proposed in this paper.Based on the preparation and characterization of CsPbBr3 nanometer crystal films,the preparation methods and means of similar active films are analyzed.Combined with the application needs,this paper designed the electron beam pumping structure with microchannel plate as the core,and verified the maser effect of CsPbBr3 nanometer crystal film under electron beam pumping through experiments,and analyzed its maser principle and physical phenomenon.Finally,the instantaneous advantage of CsPbBr3 nanometer crystal thin film is verified by instantaneous optical pumping.In the instantaneous detection system of the new developed film,not only has good transient characteristics and time resolution,but also can use the electron beam pumping to induce laser to form the second stage of light amplification,thus improving the overall detection ability of the device.